1. What will be the output of the following Python code?
>>>names = ['Amir', 'Bear', 'Charlton', 'Daman']
>>>print(names[-1][-1])
a) A
b) Daman
c) error
d) n
Explanation: Execute in the shell to verify.
2. What will be the output of the following Python code?
names1 = ['Amir', 'Bear', 'Charlton', 'Daman']
names2 = names1
names3 = names1[:]
names2[0] = 'Alice'
names3[1] = 'Bob'
sum = 0
for ls in (names1, names2, names3):
if ls[0] == 'Alice':
sum += 1
if ls[1] == 'Bob':
sum += 10
print sum
a) 11
b) 12
c) 21
d) 22
Explanation: When assigning names1 to names2, we create a second reference to the same list. Changes to names2 affect names1. When assigning the slice of all elements in names1 to names3, we are creating a full copy of names1 which can be modified independently.
3. Suppose list1 is [1, 3, 2], What is list1 * 2?
a) [2, 6, 4]
b) [1, 3, 2, 1, 3]
c) [1, 3, 2, 1, 3, 2]
d) [1, 3, 2, 3, 2, 1]
Explanation: Execute in the shell and verify.
4. Suppose list1 = [0.5 * x for x in range(0, 4)], list1 is:
a) [0, 1, 2, 3]
b) [0, 1, 2, 3, 4]
c) [0.0, 0.5, 1.0, 1.5]
d) [0.0, 0.5, 1.0, 1.5, 2.0]
Explanation: Execute in the shell to verify.
5. What will be the output of the following Python code?
>>>list1 = [11, 2, 23]
>>>list2 = [11, 2, 2]
>>>list1 < list2
a) true
b) false
c) error
d) none
Explanation: Elements are compared one by one.
6. To add a new element to a list we use which command?
a) list1.add(5)
b) list1.append(5)
c) list1.addLast(5)
d) list1.addEnd(5)
Explanation: We use the function append to add an element to the list.
7. To insert 5 to the third position in list1, we use which command?
a) list1.insert(3, 5)
b) list1.insert(2, 5)
c) list1.add(3, 5)
d) list1.append(3, 5)
Explanation: Execute in the shell to verify.
8. To remove string “hello” from list1, we use which command?
a) list1.remove(“hello”)
b) list1.remove(hello)
c) list1.removeAll(“hello”)
d) list1.removeOne(“hello”)
Explanation: Execute in the shell to verify.
9. Suppose list1 is [3, 4, 5, 20, 5], what is list1.index(5)?
a) 0
b) 1
c) 4
d) 2
Explanation: Execute help(list.index) to get details.
10. Suppose list1 is [3, 4, 5, 20, 5, 25, 1, 3], what is list1.count(5)?
a) 0
b) 4
c) 1
d) 2
Explanation: Execute in the shell to verify.